//
//  MFVisitorView.swift
//  weiBoMf
//
//  Created by lcd on 16/4/7.
//  Copyright © 2016年 lcd. All rights reserved.
//

import UIKit

class MFVisitorView: UIView {

    
    // MARK: - 设置视图信息
    /// 设置视图信息
    ///
    /// - parameter imageName: 图片名称，首页设置为 nil
    /// - parameter title:     消息文字
    func setupInfo(imageName: String?, title: String) {
        
        messageLable.text = title
        
        // 如果图片名称为 nil，说明是首页，直接返回
        guard let imgName = imageName else {
            // 播放动画
            startAnim()
            
            return
        }
        
        iconView.image = UIImage(named: imgName)
        // 隐藏小房子
        homeIconView.hidden = true
        // 将遮罩图像移动到底层
        sendSubviewToBack(maskIconView)
    }
    
    /// 开启首页转轮动画
    private func startAnim() {
        
        let anim = CABasicAnimation(keyPath: "transform.rotation")
        
        anim.toValue = 2 * M_PI
        anim.repeatCount = MAXFLOAT
        anim.duration = 20
        
        // 用在不断重复的动画上，当动画绑定的图层对应的视图被销毁，动画会自动被销毁
        anim.removedOnCompletion = false
        
        // 添加到图层
        iconView.layer.addAnimation(anim, forKey: nil)
    }
    
    // MARK: - 构造函数
    // initWithFrame 是 UIView 的指定构造函数
    // 使用纯代码开发使用的
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        setUpUi()
    }
    
    // initWithCoder - 使用 SB & XIB 开发加载的函数
    // 使用 sb 开始的入口
    required init?(coder aDecoder: NSCoder) {
        // 导致如果使用 SB 开发，调用这个视图，会直接崩溃
        // fatalError("init(coder:) has not been implemented")
        super.init(coder: aDecoder)
        
        setUpUi()
    }
    
    
    /// 懒加载控件
    private lazy var iconView: UIImageView = UIImageView(image :UIImage(named: "visitordiscover_feed_image_smallicon"))
    private lazy var maskIconView: UIImageView = UIImageView(image :UIImage(named: "visitordiscover_feed_mask_smallicon"))
    private lazy var homeIconView: UIImageView = UIImageView(image :UIImage(named: "visitordiscover_feed_image_house"))
    
    
    /// 消息文字
    private lazy var messageLable: UILabel = {
    
        let lable  = UILabel()
        lable.text = "关注一些人，回这里看看有什么惊喜关注一些人，回这里看看有什么惊喜"
        lable.textColor = UIColor.darkGrayColor()
        lable.font = UIFont.systemFontOfSize(14)
        lable.numberOfLines = 0
        lable.textAlignment = NSTextAlignment.Center
        
        return lable
    
    }()
    
    /// 注册按钮
    private lazy var registerBtn: UIButton = {
    
    let button = UIButton()
        button.setTitle("注册", forState: UIControlState.Normal)
        button.setTitleColor(UIColor.orangeColor(), forState: UIControlState.Normal)
        button.setBackgroundImage(UIImage(named: "common_button_white_disable"), forState: UIControlState.Normal)
        return button

    }()
   
    /// 登录按钮
    private lazy var loginBtn: UIButton = {
        
        let button = UIButton()
        button.setTitle("登录", forState: UIControlState.Normal)
        button.setTitleColor(UIColor.orangeColor(), forState: UIControlState.Normal)
        button.setBackgroundImage(UIImage(named: "common_button_white_disable"), forState: UIControlState.Normal)
        return button
        
    }()
    
    

}


extension MFVisitorView{
    /// 设置界面
    private func setUpUi() {
    addSubview(iconView)
    addSubview(maskIconView)
    addSubview(homeIconView)
    addSubview(messageLable)
    addSubview(registerBtn)
    addSubview(loginBtn)
        // 2. 设置自动布局
        /**
         - 添加约束需要添加到父视图上
         - 建议，子视图最好有一个统一的参照物！
         */
        // translatesAutoresizingMaskIntoConstraints 默认是 true，支持使用 setFrame 的方式设置控件位置
        // false 支持使用自动布局来设置控件位置
        for v in subviews {
            v.translatesAutoresizingMaskIntoConstraints = false
        }
        
        // 1> 图标
        addConstraint(NSLayoutConstraint(item: iconView, attribute: .CenterX, relatedBy: .Equal, toItem: self, attribute: .CenterX, multiplier: 1.0, constant: 0))
        addConstraint(NSLayoutConstraint(item: iconView, attribute: .CenterY, relatedBy: .Equal, toItem: self, attribute: .CenterY, multiplier: 1.0, constant: -60))
        // 2> 小房子
        addConstraint(NSLayoutConstraint(item: homeIconView, attribute: .CenterX, relatedBy: .Equal, toItem: iconView, attribute: .CenterX, multiplier: 1.0, constant: 0))
        addConstraint(NSLayoutConstraint(item: homeIconView, attribute: .CenterY, relatedBy: .Equal, toItem: iconView, attribute: .CenterY, multiplier: 1.0, constant: 0))
        // 3> 消息文字
        addConstraint(NSLayoutConstraint(item: messageLable, attribute: .CenterX, relatedBy: .Equal, toItem: iconView, attribute: .CenterX, multiplier: 1.0, constant: 0))
        addConstraint(NSLayoutConstraint(item: messageLable, attribute: .Top, relatedBy: .Equal, toItem: iconView, attribute: .Bottom, multiplier: 1.0, constant: 16))
        addConstraint(NSLayoutConstraint(item: messageLable, attribute: .Width, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 224))
        addConstraint(NSLayoutConstraint(item: messageLable, attribute: .Height, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 36))
        
        // 4> 注册按钮
        addConstraint(NSLayoutConstraint(item: registerBtn, attribute: .Left, relatedBy: .Equal, toItem: messageLable, attribute: .Left, multiplier: 1.0, constant: 0))
        addConstraint(NSLayoutConstraint(item: registerBtn, attribute: .Top, relatedBy: .Equal, toItem: messageLable, attribute: .Bottom, multiplier: 1.0, constant: 16))
        addConstraint(NSLayoutConstraint(item: registerBtn, attribute: .Width, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 100))
        addConstraint(NSLayoutConstraint(item: registerBtn, attribute: .Height, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 36))
        // 5> 登录按钮
        addConstraint(NSLayoutConstraint(item: loginBtn, attribute: .Right, relatedBy: .Equal, toItem: messageLable, attribute: .Right, multiplier: 1.0, constant: 0))
        addConstraint(NSLayoutConstraint(item: loginBtn, attribute: .Top, relatedBy: .Equal, toItem: messageLable, attribute: .Bottom, multiplier: 1.0, constant: 16))
        addConstraint(NSLayoutConstraint(item: loginBtn, attribute: .Width, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 100))
        addConstraint(NSLayoutConstraint(item: loginBtn, attribute: .Height, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 36))
        
        // 6. 遮罩图像
        /**
         VFL : 可视化格式语言
         
         H 水平方向
         V 垂直方向
         | 边界
         [] 包装控件
         views: 是一个字典 [名字: 控件名] - VFL 字符串中表示控件的字符串
         metrics: 是一个字典 [名字: NSNumber] - VFL 字符串中表示某一个数值
         */
        addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("H:|-0-[mask]-0-|", options: [], metrics: nil, views: ["mask": maskIconView]))
        addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("V:|-0-[mask]-(btnHeight)-[regButton]", options: [], metrics: ["btnHeight": -36], views: ["mask": maskIconView, "regButton": registerBtn]))
        
        // 设置背景颜色 - 灰度图 R = G = B，在 UI 元素中，大多数都使用灰度图，或者纯色图(安全色)
        backgroundColor = UIColor(white: 237.0 / 255.0, alpha: 1.0)
    }
    
}
